AK4955 Datasheet, PDF (57/117 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/SPK/Cap-less VIDEO-AMP/ LDO & DSP

[AK4955]
MIN pin
BPM1-0 bits = “00”
MIN-Amp
BEEPL
BEEPS
LOUT / ROUT pin
SPP/SPN pin
Figure 45. Block Diagram of MIN pin (BPM1-0 bits = “00”)
• External Resistance Mode (BPM1-0 bit = “01”)
Gain setting of input BEEP signal is controlled by an external resistor R_i. The gain is in inverse proportion to the R_i value.
(Figure 46) Gain setting by BPLVL3-0 bits is not available.
MIN pin
Ri
BPM1-0 bits = “01”
typ 72kΩ
BEEPL
LOUT / ROUT pin
MIN-Amp
BEEPS
SPP / SPN pin
Figure 46. Block Diagram of MIN pin (BPM1-0 bits = “01”)
SPKG1-0 bits
00
01
10
11
MIN Æ SPP/SPN Gain
ALC2 bit = “0”
ALC2 bit = “1”
+6.1dB
+8.1dB
+8.1dB
+10.1dB
+10.1dB
+12.1dB
+12.1dB
+14.1dB
Table 46. MIN Æ SPK Output Gain
(default)
LVCM1-0 bits
MIN Æ Lineout Gain
00
−1.34dB
01
0dB
10
+2.50dB
11
+3.52dB
Table 47.MIN Æ Lineout Gain (x: Don’t care)
MS1343-E-00
- 57 -
2011/12